Internal-combustion engine.



lT. L. L T.1. STURTEVANT.

INTERNAL COMBUSTION ENGINE.

APPLICATION FILED AUG.5, 1914.

Ll. Patented Dec. 21, 1915.

Ill

THOMAS L. STURTEVANT, OF QUINCY, AND THOMAS JOSEPH STURTEVANT, 0FWELLESLEY, MASSACHUSETTS, ASSIGNORS TO STUR'IEVANT MILL COMPANY,

A CORPORATION OF MAINE.

INTERNAL-COMBUSTION ENGINE.

i ,mama

Specification of Letters Patent.

Patented lDec. 21, 11915.

To all whom t may concern.'

Be it known that we, THOMAS L. S'iUR'imvxN'r and Tiionxs J.S'rcirriivAN'i, citizens of the United States, residing, respectively,at Quincy and Wellesley, in the county of Norfolk and State ofMassachusetts, have invented or discovered certain new and usefulImprovements in Internal-Combustion Engines, of which the following is aspecification, reference being had therein to the accompanying drawings.

rl`his invention relates to multiple-cylinder internal combustionengines, and has for its object to provide efficient means for coolingthe cylinders and other parts in a uniform manner so as to equalize, asnearly as possible, the temperature of the heated parts in such a waythat expansion, due to heat, will be practically uniform, therebyavoiding distortion due to unequal expansion. For eXample, in a marineengine of the well-known uri-ay & Tregurtha type, in which the cylindersare arranged in tandem or in line with each other, if the water forcooling the engine cylinders and their parts be introduced into thewater box at one end thereof, and be discharged at the other endthereof, it will be much warmer at the discharge end of the water boxthan at the entering end thereof, and the cylinders, for example, of asix cylinder engine, will therefore be unequally cooled, and more orless distortion of the engine, due to unequal expansion by heat, is thusliable to result. In accordance with the present improvement, however,the water supply pipe or pipes, extending longitudinally of the waterbox, are perforated throughout their lengths so as to discharge thecooling watei in jets throughout the length of the box, therebyuniformly cooling the cylinders and other parts. In accordance with thepresent invention the exhaust pipe of the several enlgine cylinders ispreferably located in the water box and adjacent to a perforated waterpipe, so as to be cooled throughout its length by jets of water fromsaid pipe. Also in accordance with the present invention the cylinderheads may be cooled by water owing from the water box through anencircling series of pipes affording passages from the water box to thechambers of the jacketed cylinder heads, and the lubricating oil supplypipe is preferably located in the fuel 'inlet pipe so as to be cooled bythe expansion due to the fuel spray in said fuel inlet pipe. Thelubricating oil thus cooled 1s` forced under pressure through said oilpipe and is streamed upon the engine bearings or surfaces which ai'e tobe lubricated and kept cool.

In the accompanying drawing Figure l is a plan view of a part of aninternal conibustion engine embodying the present invention. Fig. 2 is avertical section of the saine on .line .Q4-2, Fig. 1. Fig. 3 is avertical section of the saine on line 3-3, Fig. 2. Figs. 1 and 5illustrate a slight modification of the invention.

Referring to the drawing, 12 denotes the water box of an internalcombustion engine and which water box may he of any desired length,according to the number of cylinders which the engine may have. Thecylinders 13, of any desired number, are preferably removably mounted inthe Water box 12 into which they are tightly tted in any suitableJ orwell-known manner. Thewater box 12 is open from end to end and thusaffords a single or continuous chamber throughout the length of theengine, and the cylinders 13 are surrounded by the space of this chamberso that they are nearly immersed in the water therein contained, whenthe chamber is filled.

In the drawingsonly two cylinders are shown, but it will be understoodthat an engine embodying the present invention may have four, six, orany other desired numi ber of cylinders.

Mounted on each of the cylinders 13 is a water jacketed head 14, thesecylinder heads being secured to the cylinders in any suitable manner, asby means of bolts 15 passing through flanges in the cylinder heads andcylinders, and suitable packings may be located between said flanges tomake tight joints. The chamber of the water box communicates with thechambers of the Water jackets of the cylinder heads by means of a seriesof' pipes 16 arranged around or encircling the cylinders and cylinderheads, as indicated by dotted lines at the left of Fig. 1, so that thecooling water from the water `box will be forced into the Water jacketsof the cylinder heads by a plurality of jets disposed about .thecylinder heads such a manner as to effect a uniform coohng of the same,the cooling water iiowing upward 1n the cylinder heads through the plpes1?, and being discharged therefrom at the exist 17 which willcommunicate with a suitable discharge pipe.

The exhaust pipe 18, which communlcates with the several cylinder heads,is preferably arranged in the chamber of the 'water box through which itextends longitudinally, and the cooling water is introduced into thechamber 'of the water box through a pipe 19 preferably arranged adjacentto the exhaust pipe 18, said water pipe being provided along andpreferably throughout its length with perforations so that jets of Waterwill be discharged therefrom in such a manner as to cool the exhaustpipe uniformly and also so as to maintain the temperature of the waterin the Water box, throughout the length thereof, as nearly uniform aspossible. A second longitudinally extending perforated water pipe 19 maybe employed, if desired, although this is not absolutely necessary. Thewater is forced through the pipe 19 by a suitable pump, as is usual.

The oil pipe 20, through which the oil for lubricating the bearings ofthe engine is supplied is, in accordance with the present invention,preferably partly located within the fuel inlet pipe 21, which lattercommunicates with the inlet ports of the cylinder heads in the usualmanner. Thus the lubricating oil will be cooled by the evaporation orvaporization of the liquid hydrocarbon fuel in said fuel inlet pipe assaid lubricating oil is forced under pressure to the engine bearings towhich it is stream-applied.

The cylinders 13 will, of course, be provided as usual with pistons 22,but as these and other parts of the engine form no part of the presentinvention further description or illustration thereof is not necessary.

The water box 12 is preferably provided at or near its bottom with anopening closed by a removable plug 23 and through which opening all ofthe Water may be withdrawn fromsaid box and the jacketed cylinder headswhen said plug is removed.

From the foregoing it will be understood that the' present inventionprovides means whereby the temperature of the water in the chamber ofthe water box of the engine may be equalized throughout the length ofsaid box, so that distortion iof the engine parts, due to unequalexpansion by heat, may be avoided, and also provides constructionswhereby the cylinder heads may be uniformly cooled by means of waterflowing through a plurality of water inlets to the chambers of thejackets thereof, as also means whereby the dangerous exhaust pipe' maybe cooled, and means whereby the pipe supplying the lubricating oil forthe bearings of the engine may be safely located out of the way and keptproperly cooled.v

The invention is not to be understood as being limited to the detailsherein shown, as other means than the longitudinally extendingperforated inlet water pipe or pipes may be employed, as, for example,by jetting the water mto the water box through its sides throughout thelength thereof, as will be understood from Figs. 4 and 5, or by otherconstructions whereby the cylinders and other parts may be jet-cooled insuch a manner as to keep them at equal temperatures, or approximatelyso.

In the construction shown in Figs. 4 and 5 the Water will be jetted intothe water box 12 from the water conduit 19b through a longitudinalseries of openings formed in the sides of said box.

Having thus described our invention we claim and desire to secure byLetters Patent:-

1. In an internal combustion engine, the combinationA with a pluralityof engine cylinders, of a water box providing a continuous chamber bywhich said cylinders are surrounded, and means whereby jets or streamsof water may be discharged into said chamber of said box at separatedpoints throughout its length, so that the temperature of the coolingwater in said chamber will be approximately equalized in all parts ofsaid chamber.

2. In an internal combustion engine, the combination with a plurality ofengine cylinders, of a water box providing a continuous chamber by whichsaid cylinders are surrounded, and a water supply pipe extendinglongitudinally in said chamber, about midway between the top and bottonithereof, and provided throughout its length with perforations todischarge the cooling water, whereby the temperature of the coolingwater in said chamber will be approxigiately equalized in all parts ofsaid chamer. A

3. In an internal combustion engine, the combination with a plurality ofengine cylinders, of a water box providing a continuous chamber by whichsaid cylinders are surrounded, an exhaust pipe extending longitudinallyin said water box, and means whereby jets or streams of water may bedischarged into said chamber along its length and adjacent to saidexhaust pipe.

Ll. ln an internal combustion engine, the combination with a pluralityof engine cylinders, of a water box providing a continuous chambersurrounding said cylinders, an exhaust pipe extending longitudinally insaid water box, and a water supply pipe extending longitudinally in thechamber of sald box adjacent said exhaust pipe and provided along itslength with perforations.

combination with a ideama l; i.:

5. In an internal combustion engine, the

plurality of engine cylinders, of a Water box providing a continuouschamber by which said cylinders are surrounded, a jacketed head for eachof said cylinders, and a plurality of pipes spaced apart about saidcylinder heads and affording a plurality of passages between the saidchamber of said Water box and the chambers of said water jackets, sothat water may flow in a plurality of streams from the chamber of saidwater box to the chambers of the water jackets of said cylinder heads.

6. In an internal combustion engine, the combination with a plurality ofengine cylinders, of a water box providing a chamber about saidcylinders, a jacketed head for each` of said cylinders, a plurality ofwater passagesspaced apart about said cylinder heads and connecting thechambers of said jacketed heads with the chamber of said box, wherebywater may flow in a plurality of streams from the said water box to thechambers of the Water jackets of said cylinder heads, and means fordischarging numerous jets of water into the chamber of said box.

7. lln an internal combustion engine, the combination with a pluralityof engine cylinders, of a water box providing a chamber about saidcylinders, a jacketed head for each of said cylinders, a plurality ofwater passages about said cylinder heads, whereby water may flow in aplurality of streams from the said water box to the chambers of thewater jackets of said cylinder heads, and means for discharging numerousjets of Water into the chamber of said box, said means consisting of awater pipe extending longitudinally in the chamber of said box andprovided along its length with perforations.

8. ln an internal combustion engine, the combination with a. water box,of a plurality of engine cylinders removablymounted in said box, thelatter providing a continuous chamber surrounding said cylinders, meansfor mixing the cooling water in said box so that its temperature may beapproximately equalized throughout said box, individual, removable,jacketed cylinder heads carried by said box, and means providing aplurality of water passages between the chamber of said box and each ofsaid heads,

.the latter being each provided with a water outlet.

9. ln anA internal combustion engine, the combination with a pluralityof engine cylinders, of a water box providing a common chamber forcooling said cylinders, a removable jacketed head for each of saidcylinders carried by said water box, and a plurality of pipes o-rpassages spaced apart around each of said j acketed cylinder heads andaffording a plurality of passages whereby water may be forced from saidwater box to the chamber of the jacket of each cylinder head; each ofsaid jacketed heads having means whereby the water may be dischargedtherefrom.

10. In an internal combustion engine, the combination with a pluralityof engine cylinders having a common water box for containing water forcooling the same, each of said cylinders having a removable jacketedhead, aplurality of water pipes or passages between the chamber o f saidwater box and the chamber o f the jacket of each head, and means forequalizing the temperature of the water in said box.

l1. ln an internal combustion engine, the combination with a pluralityof engine cylinders, of a water box common to all and in the water ofwhich each cylinder will be nearly immersed, said box also carrying foreach cylinder a removable jacketed head with water passages connectingthe chamber of each jacket with the chamber of said water box, anexhaust pipe arranged in the chamber of said water box and connected bya gas passage way with each cylinder head, said exhaust pipe extendingthrough one end of said water box and discharging,

outside of said box, the exhaust livered to it from said heads.

In testimony whereof we aflix our signatures, in presence of twowitnesses.

THOMAS L. STURTEVJANT. THOMAS JOSEPH STURTEVANT.

gases de- Witnesses:

HENRY CALvER, M. E. RATHvoN.

